CN112622234A - PE water supply pipe with corrosion-resistant structural design and preparation process thereof - Google Patents
PE water supply pipe with corrosion-resistant structural design and preparation process thereof Download PDFInfo
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- CN112622234A CN112622234A CN202011385208.1A CN202011385208A CN112622234A CN 112622234 A CN112622234 A CN 112622234A CN 202011385208 A CN202011385208 A CN 202011385208A CN 112622234 A CN112622234 A CN 112622234A
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- corrosion
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- water
- structural design
- heat sealing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/06—Sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a PE water supply pipe with a corrosion-resistant structural design and a preparation process thereof, and relates to the field of pipes. According to the invention, through the arranged protective sleeve, the annular spring is added in the protective sleeve, the heat sealing pad is arranged at the position where the protective sleeve is contacted with the tube body, and the water-swelling water stop strips are arranged on two sides of the inner wall of the heat sealing pad, so that each section of the protective sleeve belongs to an independent closed cavity when heat sealing is completed, when one section of protective sleeve is damaged, the water-swelling water stop strips are contacted with water to rapidly swell, and the protective sleeve is blocked, further the tube body is not easy to corrode externally, and meanwhile, the arranged protective sleeve can protect the tube body, so that the tube body is prevented from being cracked in cold winter.
Description
Technical Field
The invention relates to the field of pipe preparation, in particular to a PE water supply pipe with a corrosion-resistant structural design and a preparation process thereof.
Background
The PE pipe is polymerized by monomer ethylene, and because the polymerization reaction conditions such as pressure, temperature and the like are different during polymerization, resins with different densities can be obtained, so that the PE pipe has the advantages of high-density polyethylene, medium-density polyethylene and low-density polyethylene, when different types of PE pipes are processed, different resin brands are selected according to different application conditions, the requirements on an extruder and a die are different, and with economic progress, a PE water supply pipe can be used in many areas to meet the water consumption and drainage requirements of home users when high-rise buildings are built.
However, when the PE water supply is used in winter at present, the exposed PE pipe is easy to burst, daily water use and drainage are affected, meanwhile, the PE water supply is easy to corrode after being contacted with water for a long time in underground use, and the service life of the PE water supply is shortened.
Disclosure of Invention
The invention aims to: in order to solve the problem, a PE water supply pipe with a corrosion-resistant structural design and a preparation process thereof are provided.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a PE feed pipe and preparation technology with corrosion-resistant structural design, includes the body, the inside of body is provided with the vacuum layer, and the outside of body is provided with the anticorrosive coating, the outside of anticorrosive coating is provided with the heat-seal layer, and the outside on heat-seal layer is provided with the lag, the inside of lag evenly is provided with the heat sealing pad, and the inside of lag evenly is provided with the spring, the inner wall of body is provided with the spiral plate.
Preferably, the pipe body 1 is prepared by the following steps:
the method comprises the following steps: firstly, taking 100 parts of high-density polyethylene and 2-6 parts of black master batch as raw materials, and uniformly mixing to obtain a mixed material;
step two: then taking out the sulfur powder, uniformly mixing the sulfur powder with lime sulfur and diluting the mixture to a proper amount of components;
step three: adding the mixed solution obtained in the step two into the mixed material obtained in the step one, introducing the mixed material into a high-speed mixer for mixing, and heating the mixed material;
step four: putting the heated mixed material into a drying bin for cooling, and pushing the cooled material into a pipe extruder to extrude a pipe;
step five: pushing the extruded pipe into cold water for cooling, and then rotating the inner part of the pipe body in the water by using a screw machine to obtain a spiral plate;
step six: taking out the pipeline, air-drying, spraying an anticorrosive layer on the outer side of the pipe body by using a spraying machine, and spraying a heat-sealing layer on the outer side of the pipe body by using another spraying machine;
step seven: afterwards, the protecting sleeve is gradually pushed to one side of the tube body, a heat sealing machine is used after pushing is completed, and the tube body and the protecting sleeve are subjected to heat sealing under the mutual matching effect of the heat sealing pad and the heat sealing layer.
Preferably, the two sides of the interior of the heat sealing pad are provided with water-swelling water stop strips, and the outer side of the protective sleeve is uniformly coated with anticorrosive paint.
Preferably, the number of the springs is multiple groups, the multiple groups of the springs are of annular structures, and lubricating oil is uniformly coated on the springs.
Preferably, the extruder in step four has a body temperature: 230 ℃ and 190 ℃, the temperature of the confluence core in the extruder: 230 ℃ and 190 ℃, and the head temperature of the extruder: 190 ℃ to 230 ℃; main engine rotation speed of extruder: 20-100 rpm.
Preferably, the heating temperature of the three steps is 80-90 ℃, and the cooling temperature of the drying bin in the fourth step is 20-35 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the arranged protective sleeve, the annular spring is added in the protective sleeve, the heat sealing pad is arranged at the position where the protective sleeve is contacted with the tube body, and the water-swelling water stop strips are arranged on two sides of the inner wall of the heat sealing pad, so that each section of the protective sleeve belongs to an independent closed cavity when heat sealing is completed, when one section of protective sleeve is damaged, the water-swelling water stop strips are contacted with water to rapidly swell, and the protective sleeve is blocked, further the tube body is not easy to corrode externally, and meanwhile, the arranged protective sleeve can protect the tube body, so that the tube body is prevented from being cracked in cold winter.
2. Through adding sulphur powder, lime sulphur in the raw materials to with its and high density polyethylene and black masterbatch homogeneous mixing, thereby when making the inside of body and some sewage contact, can disinfect it, prevent bacterial growing, thereby prevent the inside rotten of body, the life of greatly increased body.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the protective cover of the present invention;
FIG. 3 is a schematic view of the inner wall structure of the tube body according to the present invention;
FIG. 4 is a schematic view of the internal structure of the tube of the present invention;
FIG. 5 is a schematic view of the internal structure of the heat seal of the present invention.
In the figure: 1. a pipe body; 2. a protective sleeve; 3. a heat seal pad; 4. a spring; 5. a spiral plate; 6. a vacuum layer; 7. an anticorrosive layer; 8. a heat seal layer; 9. a water stop rod expanding when meeting water.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1-5, a PE water supply pipe with corrosion resistant structure design and a preparation process thereof, comprising a pipe body 1, wherein a vacuum layer 6 is arranged inside the pipe body 1, an anti-corrosion layer 7 is arranged outside the pipe body 1, a heat sealing layer 8 is arranged outside the anti-corrosion layer 7, a protective cover 2 is arranged outside the heat sealing layer 8, a heat sealing pad 3 is uniformly arranged inside the protective cover 2, a spring 4 is uniformly arranged inside the protective cover 2, a spiral plate 5 is arranged on the inner wall of the pipe body 1, and the pipe body 1 is specifically prepared by the following steps: the method comprises the following steps: firstly, taking 100 parts of high-density polyethylene and 2-6 parts of black master batch as raw materials, and uniformly mixing to obtain a mixed material;
step two: then taking out the sulfur powder, uniformly mixing the sulfur powder with lime sulfur and diluting the mixture to a proper amount of components;
step three: adding the mixed solution obtained in the step two into the mixed material obtained in the step one, introducing the mixed material into a high-speed mixer for mixing, and heating the mixed material;
step four: putting the heated mixed material into a drying bin for cooling, and pushing the cooled material into a pipe extruder to extrude a pipe;
step five: pushing the extruded pipe into cold water for cooling, and then rotating the interior of the pipe body 1 in the water by using a screw machine to obtain a spiral plate 5;
step six: taking out the pipeline, air-drying, spraying a corrosion-resistant layer 7 on the outer side of the pipe body 1 by using a spraying machine, and spraying a heat-sealing layer 8 on the outer side of the pipe body 1 by using another spraying machine;
step seven: then the protection sleeve 2 is gradually pushed to one side of the tube body 1, a heat sealing machine is used after pushing is finished, under the mutual matching action of a heat sealing pad 3 and a heat sealing layer 8, the tube body 1 and the protection sleeve 2 are subjected to heat sealing, sulfur powder and lime set are added into raw materials, and the raw materials are uniformly mixed with high-density polyethylene and black master batch, so that when the interior of the tube body 1 is contacted with some sewage, the tube body can be sterilized, bacterial breeding is prevented, the interior of the tube body 1 is prevented from being rotten, the service life of the tube body 1 is greatly prolonged, water-swelling water stop strips 9 are arranged on two sides of the interior of the heat sealing pad 3, anticorrosive paint is uniformly coated on the outer side of the protection sleeve 2, the number of the springs 4 is multiple, the multiple groups of the springs 4 are of annular structures, lubricating oil is uniformly coated on the springs 4, and the damaged protection sleeve 2 can be quickly plugged through the two groups of the water, reduce the damage to body 1, anticorrosive coating places lag 2 and rots, and the ring spring 4 of setting supports the protective sheath, can protect body 1, and the lubricating oil of setting is placed 4 deformation of spring and is damaged protective sheath 2, the fuselage temperature of step four well extruders: 230 ℃ and 190 ℃, the temperature of the confluence core in the extruder: 230 ℃ and 190 ℃, and the head temperature of the extruder: 190 ℃ to 230 ℃; main engine rotation speed of extruder: 20-100 rpm, the three heating temperatures in the step are 80-90 ℃, the cooling temperature of the drying bin in the step four is 20-35 ℃, the temperature in the extruding machine is set to a specified value, the processing quality of the pipe body 1 can be greatly improved, defective products are reduced, the heating temperature is set to 80-90 ℃, moisture can be rapidly evaporated, the cooling temperature is set to 20-35 ℃, and raw material damage caused by supercooling is prevented.
According to the invention, the protective sleeve 2 is arranged, the annular spring 4 is added into the protective sleeve 2, the heat sealing pad 3 is arranged at the position where the protective sleeve 2 is contacted with the pipe body 1, the water-swelling water stop strips 9 are arranged on two sides of the inner wall of the heat sealing pad 3, when heat sealing is completed, each section of the protective sleeve 2 belongs to an independent closed cavity, when one section of the protective sleeve 2 is damaged, the water-swelling water stop strips 9 are contacted with water to rapidly swell, so that the protective sleeve 2 is blocked, and further, the pipe body 1 is not easy to corrode outside.
Example one
100 parts of polyethylene, 2 parts of color master batch, 0 part of sulfur powder and 0 part of lime sulfur, wherein the cooling temperature is 20-30 ℃, and a protective sleeve is not used;
example two
100 parts of polyethylene, 2 parts of color master batch, 1 part of sulfur powder and 1 part of lime sulfur, wherein the cooling temperature is 20-30 ℃, and a protective sleeve is not used;
EXAMPLE III
100 parts of polyethylene, 2 parts of color master batch, 4 parts of sulfur powder and 4 parts of lime sulfur, wherein the cooling temperature is 20-30 ℃, and a protective sleeve is not used;
example four
100 parts of polyethylene, 2 parts of color master batch, 8 parts of sulfur powder and 8 parts of lime sulfur, wherein the cooling temperature is 20-30 ℃, and a protective sleeve is not used;
EXAMPLE five
100 parts of polyethylene, 2 parts of color master batch, 4 parts of sulfur powder and 4 parts of lime sulfur, wherein the cooling temperature is 20-30 ℃, and the protective sleeve is sleeved;
EXAMPLE six
100 parts of polyethylene, 2 parts of color master batch, 4 parts of sulfur powder and 4 parts of lime sulfur, wherein the cooling temperature is higher than 30 ℃, and the protective sleeve is used.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a PE feed pipe and preparation technology with corrosion-resistant structural design, includes body (1), its characterized in that: the inside of body (1) is provided with vacuum layer (6), and the outside of body (1) is provided with anticorrosive coating (7), the outside of anticorrosive coating (7) is provided with heat-seal layer (8), and the outside on heat-seal layer (8) is provided with lag (2), the inside of lag (2) evenly is provided with heat sealing pad (3), and the inside of lag (2) evenly is provided with spring (4), the inner wall of body (1) is provided with spiral plate (5).
2. The PE water supply pipe with corrosion-resistant structural design and the preparation process thereof as claimed in claim 1, wherein: the pipe body (1) is prepared by the following steps:
the method comprises the following steps: firstly, taking 100 parts of high-density polyethylene and 2-6 parts of black master batch as raw materials, and uniformly mixing to obtain a mixed material;
step two: then taking out the sulfur powder, uniformly mixing the sulfur powder with lime sulfur and diluting the mixture to a proper amount of components;
step three: adding the mixed solution obtained in the step two into the mixed material obtained in the step one, introducing the mixed material into a high-speed mixer for mixing, and heating the mixed material;
step four: putting the heated mixed material into a drying bin for cooling, and pushing the cooled material into a pipe extruder to extrude a pipe;
step five: pushing the extruded pipe into cold water for cooling, and then rotating the interior of the pipe body (1) in the water by using a screw machine to obtain a spiral plate (5);
step six: taking out the pipeline, air-drying, spraying a corrosion-resistant layer (7) on the outer side of the pipe body (1) by using a spraying machine, and spraying a heat-sealing layer (8) on the outer side of the pipe body (1) by using another spraying machine;
step seven: afterwards, the protection sleeve (2) is gradually pushed to one side of the tube body (1), a heat sealing machine is used after pushing is completed, and the tube body (1) and the protection sleeve (2) are subjected to heat sealing under the mutual matching effect of the heat sealing pad (3) and the heat sealing layer (8).
3. The PE water supply pipe with corrosion-resistant structural design and the preparation process thereof as claimed in claim 1, wherein: the heat-seal gasket (3) is characterized in that water-swelling water stop strips (9) are arranged on two sides inside the heat-seal gasket, and anticorrosive paint is uniformly coated on the outer side of the protective sleeve (2).
4. The PE water supply pipe with corrosion-resistant structural design and the preparation process thereof as claimed in claim 1, wherein: the number of the springs (4) is multiple, the multiple groups of the springs (4) are of annular structures, and lubricating oil is uniformly coated on the springs (4).
5. The PE water supply pipe with corrosion-resistant structural design and the preparation process thereof as claimed in claim 2, wherein: the temperature of the extruder body in the fourth step is as follows: 230 ℃ and 190 ℃, the temperature of the confluence core in the extruder: 230 ℃ and 190 ℃, and the head temperature of the extruder: 190 ℃ to 230 ℃; main engine rotation speed of extruder: 20-100 rpm.
6. The PE water supply pipe with corrosion-resistant structural design and the preparation process thereof as claimed in claim 2, wherein: the heating temperature of the third step is 80-90 ℃, and the cooling temperature of the drying bin in the fourth step is 20-35 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011385208.1A CN112622234B (en) | 2020-12-01 | 2020-12-01 | PE water supply pipe with corrosion-resistant structural design and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011385208.1A CN112622234B (en) | 2020-12-01 | 2020-12-01 | PE water supply pipe with corrosion-resistant structural design and preparation process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112622234A true CN112622234A (en) | 2021-04-09 |
| CN112622234B CN112622234B (en) | 2023-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011385208.1A Active CN112622234B (en) | 2020-12-01 | 2020-12-01 | PE water supply pipe with corrosion-resistant structural design and preparation process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1510893A (en) * | 1974-05-07 | 1978-05-17 | Caunned Ag | Thermally insulated pipe |
| GB9825957D0 (en) * | 1998-11-26 | 1999-01-20 | Vosper Thornycroft Ltd | Encasing tubular components |
| US20030146625A1 (en) * | 2000-02-24 | 2003-08-07 | Frans Rusting | Sealing socket and method for arranging a sealing socket to a tube |
| US20090044396A1 (en) * | 2004-08-03 | 2009-02-19 | First Green Park Pty Ltd Et Al | Corrosion resisting pipelines |
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